Question

"as we move, viewed objects cast changing shapes on our retinas, although we do not perceive the objects as changing. this is part of the phenomenon of"

Answer 1

This is part of the phenomenon of "Perceptual constancy".

Perceptual constancy, likewise called Object Constancy, or Constancy Phenomenon, the inclination of creatures and people to see recognizable questions as having standard shape, size, shading, or area paying little heed to changes in the point of viewpoint, separation, or lighting.